1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _M68K_TLBFLUSH_H 3#define _M68K_TLBFLUSH_H 4 5#ifdef CONFIG_MMU 6#ifndef CONFIG_SUN3 7 8#include <asm/current.h> 9#include <asm/mcfmmu.h> 10 11static inline void flush_tlb_kernel_page(void *addr) 12{ 13 if (CPU_IS_COLDFIRE) { 14 mmu_write(MMUOR, MMUOR_CNL); 15 } else if (CPU_IS_040_OR_060) { 16 set_fc(SUPER_DATA); 17 __asm__ __volatile__(".chip 68040\n\t" 18 "pflush (%0)\n\t" 19 ".chip 68k" 20 : : "a" (addr)); 21 set_fc(USER_DATA); 22 } else if (CPU_IS_020_OR_030) 23 __asm__ __volatile__("pflush #4,#4,(%0)" : : "a" (addr)); 24} 25 26/* 27 * flush all user-space atc entries. 28 */ 29static inline void __flush_tlb(void) 30{ 31 if (CPU_IS_COLDFIRE) { 32 mmu_write(MMUOR, MMUOR_CNL); 33 } else if (CPU_IS_040_OR_060) { 34 __asm__ __volatile__(".chip 68040\n\t" 35 "pflushan\n\t" 36 ".chip 68k"); 37 } else if (CPU_IS_020_OR_030) { 38 __asm__ __volatile__("pflush #0,#4"); 39 } 40} 41 42static inline void __flush_tlb040_one(unsigned long addr) 43{ 44 __asm__ __volatile__(".chip 68040\n\t" 45 "pflush (%0)\n\t" 46 ".chip 68k" 47 : : "a" (addr)); 48} 49 50static inline void __flush_tlb_one(unsigned long addr) 51{ 52 if (CPU_IS_COLDFIRE) 53 mmu_write(MMUOR, MMUOR_CNL); 54 else if (CPU_IS_040_OR_060) 55 __flush_tlb040_one(addr); 56 else if (CPU_IS_020_OR_030) 57 __asm__ __volatile__("pflush #0,#4,(%0)" : : "a" (addr)); 58} 59 60#define flush_tlb() __flush_tlb() 61 62/* 63 * flush all atc entries (both kernel and user-space entries). 64 */ 65static inline void flush_tlb_all(void) 66{ 67 if (CPU_IS_COLDFIRE) { 68 mmu_write(MMUOR, MMUOR_CNL); 69 } else if (CPU_IS_040_OR_060) { 70 __asm__ __volatile__(".chip 68040\n\t" 71 "pflusha\n\t" 72 ".chip 68k"); 73 } else if (CPU_IS_020_OR_030) { 74 __asm__ __volatile__("pflusha"); 75 } 76} 77 78static inline void flush_tlb_mm(struct mm_struct *mm) 79{ 80 if (mm == current->active_mm) 81 __flush_tlb(); 82} 83 84static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr) 85{ 86 if (vma->vm_mm == current->active_mm) 87 __flush_tlb_one(addr); 88} 89 90static inline void flush_tlb_range(struct vm_area_struct *vma, 91 unsigned long start, unsigned long end) 92{ 93 if (vma->vm_mm == current->active_mm) 94 __flush_tlb(); 95} 96 97static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end) 98{ 99 flush_tlb_all(); 100} 101 102#else 103 104 105/* Reserved PMEGs. */ 106extern char sun3_reserved_pmeg[SUN3_PMEGS_NUM]; 107extern unsigned long pmeg_vaddr[SUN3_PMEGS_NUM]; 108extern unsigned char pmeg_alloc[SUN3_PMEGS_NUM]; 109extern unsigned char pmeg_ctx[SUN3_PMEGS_NUM]; 110 111/* Flush all userspace mappings one by one... (why no flush command, 112 sun?) */ 113static inline void flush_tlb_all(void) 114{ 115 unsigned long addr; 116 unsigned char ctx, oldctx; 117 118 oldctx = sun3_get_context(); 119 for (addr = 0x00000000; addr < TASK_SIZE; addr += SUN3_PMEG_SIZE) { 120 for (ctx = 0; ctx < 8; ctx++) { 121 sun3_put_context(ctx); 122 sun3_put_segmap(addr, SUN3_INVALID_PMEG); 123 } 124 } 125 126 sun3_put_context(oldctx); 127 /* erase all of the userspace pmeg maps, we've clobbered them 128 all anyway */ 129 for (addr = 0; addr < SUN3_INVALID_PMEG; addr++) { 130 if (pmeg_alloc[addr] == 1) { 131 pmeg_alloc[addr] = 0; 132 pmeg_ctx[addr] = 0; 133 pmeg_vaddr[addr] = 0; 134 } 135 } 136} 137 138/* Clear user TLB entries within the context named in mm */ 139static inline void flush_tlb_mm (struct mm_struct *mm) 140{ 141 unsigned char oldctx; 142 unsigned char seg; 143 unsigned long i; 144 145 oldctx = sun3_get_context(); 146 sun3_put_context(mm->context); 147 148 for (i = 0; i < TASK_SIZE; i += SUN3_PMEG_SIZE) { 149 seg = sun3_get_segmap(i); 150 if (seg == SUN3_INVALID_PMEG) 151 continue; 152 153 sun3_put_segmap(i, SUN3_INVALID_PMEG); 154 pmeg_alloc[seg] = 0; 155 pmeg_ctx[seg] = 0; 156 pmeg_vaddr[seg] = 0; 157 } 158 159 sun3_put_context(oldctx); 160} 161 162/* Flush a single TLB page. In this case, we're limited to flushing a 163 single PMEG */ 164static inline void flush_tlb_page (struct vm_area_struct *vma, 165 unsigned long addr) 166{ 167 unsigned char oldctx; 168 unsigned char i; 169 170 oldctx = sun3_get_context(); 171 sun3_put_context(vma->vm_mm->context); 172 addr &= ~SUN3_PMEG_MASK; 173 if((i = sun3_get_segmap(addr)) != SUN3_INVALID_PMEG) 174 { 175 pmeg_alloc[i] = 0; 176 pmeg_ctx[i] = 0; 177 pmeg_vaddr[i] = 0; 178 sun3_put_segmap (addr, SUN3_INVALID_PMEG); 179 } 180 sun3_put_context(oldctx); 181 182} 183/* Flush a range of pages from TLB. */ 184 185static inline void flush_tlb_range (struct vm_area_struct *vma, 186 unsigned long start, unsigned long end) 187{ 188 struct mm_struct *mm = vma->vm_mm; 189 unsigned char seg, oldctx; 190 191 start &= ~SUN3_PMEG_MASK; 192 193 oldctx = sun3_get_context(); 194 sun3_put_context(mm->context); 195 196 while(start < end) 197 { 198 if((seg = sun3_get_segmap(start)) == SUN3_INVALID_PMEG) 199 goto next; 200 if(pmeg_ctx[seg] == mm->context) { 201 pmeg_alloc[seg] = 0; 202 pmeg_ctx[seg] = 0; 203 pmeg_vaddr[seg] = 0; 204 } 205 sun3_put_segmap(start, SUN3_INVALID_PMEG); 206 next: 207 start += SUN3_PMEG_SIZE; 208 } 209 sun3_put_context(oldctx); 210} 211 212static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end) 213{ 214 flush_tlb_all(); 215} 216 217/* Flush kernel page from TLB. */ 218static inline void flush_tlb_kernel_page (unsigned long addr) 219{ 220 sun3_put_segmap (addr & ~(SUN3_PMEG_SIZE - 1), SUN3_INVALID_PMEG); 221} 222 223#endif 224 225#else /* !CONFIG_MMU */ 226 227/* 228 * flush all user-space atc entries. 229 */ 230static inline void __flush_tlb(void) 231{ 232 BUG(); 233} 234 235static inline void __flush_tlb_one(unsigned long addr) 236{ 237 BUG(); 238} 239 240#define flush_tlb() __flush_tlb() 241 242/* 243 * flush all atc entries (both kernel and user-space entries). 244 */ 245static inline void flush_tlb_all(void) 246{ 247 BUG(); 248} 249 250static inline void flush_tlb_mm(struct mm_struct *mm) 251{ 252 BUG(); 253} 254 255static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr) 256{ 257 BUG(); 258} 259 260static inline void flush_tlb_range(struct vm_area_struct *vma, 261 unsigned long start, unsigned long end) 262{ 263 BUG(); 264} 265 266static inline void flush_tlb_kernel_page(unsigned long addr) 267{ 268 BUG(); 269} 270 271#endif /* CONFIG_MMU */ 272 273#endif /* _M68K_TLBFLUSH_H */ 274